Mukherjee, Somdutta and Roy, Amritendu and Auluck, Sushil and Prasad, Rajendra and Gupta, Rajeev and Garg, Ashish (2013) Room Temperature Nanoscale Ferroelectricity in Magnetoelectric GaFeO3 Epitaxial Thin Films. Physical Review Letters, 111 (8). 087601-1-087601-5. ISSN 0031-9007

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We demonstrate room temperature ferroelectricity in the epitaxial thin films of magnetoelectric gallium ferrite. Piezoforce measurements show a 180 degrees phase shift of piezoresponse upon switching the electric field indicating nanoscale ferroelectricity in the thin films. Further, temperature-dependent impedance analysis with and without the presence of an external magnetic field clearly reveals a pronounced magnetodielectric effect across the magnetic transition temperature. In addition, our first principles calculations show that Fe ions are not only responsible for ferrimagnetism as observed earlier but also give rise to the observed ferroelectricity, making gallium ferrite a unique single phase multiferroic.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Physical Society.
Subjects: Physics
Depositing User: Users 27 not found.
Date Deposited: 11 Jun 2020 11:17
Last Modified: 11 Jun 2020 11:17

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